hostinfo.cc

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· CC 代码 · 共 89 行

/*
 * Copyright (c) 2003, 2004, 2005
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *
 * Authors: Nathan L. Binkert
 */

#include <ctype.h>
#include <errno.h>
#include <math.h>
#include <unistd.h>

#include <stdio.h>
#include <cstdlib>
#include <cstring>
#include <string>

#include "base/misc.hh"
#include "sim/host.hh"

using namespace std;

string
__get_hostname()
{
    char host[256];
    if (gethostname(host, sizeof host) == -1)
        warn("could not get host name!");
    return host;
}

string &
hostname()
{
    static string hostname = __get_hostname();
    return hostname;
}

uint64_t
procInfo(const char *filename, const char *target)
{
    int  done = 0;
    char line[80];
    char format[80];
    long usage;

    FILE *fp = fopen(filename, "r");

    while (fp && !feof(fp) && !done) {
        if (fgets(line, 80, fp)) {
            if (strncmp(line, target, strlen(target)) == 0) {
                snprintf(format, sizeof(format), "%s %%ld", target);
                sscanf(line, format, &usage);

                fclose(fp);
                return usage ;
            }
        }
    }

    if (fp)
      fclose(fp);

    return 0;
}